21.   Professional football players are going back to school in record numbers, and some are even taking graduate courses.

22.   She has now signed up for graduate courses at Hunter College.

23.   She resumed graduate courses at the University of Massachusetts several years later, this time in medieval theological history.

24.   Someone asked if she would like to take graduate courses.

25.   The graduate course had to be rewritten.

26.   The training will include observing classroom instruction, taking graduate courses in educational psychology and child development, and teaching occasional summer classes.

27.   Then he came to the United States and took graduate courses in urban planning at Harvard.

28.   This year, Dufresne is teaching a graduate writing course on revising the novel.

29.   Workers will pay taxes on the value of tuition for graduate courses.

30.   Workers in graduate courses will have to pay taxes on tuition provided by their employers.